Regensburg 2010 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 25: Focussed Session: Strong Light Matter Coupling II
HL 25.4: Vortrag
Dienstag, 23. März 2010, 15:00–15:15, H13
Non-resonant Quantum Dot-Cavity Coupling — •Ata Ulhaq1, Sven Ulrich1, Serkan Ates1, Stephan Reitzenstein2, Andreas Löffler2, Sven Höffling2, Alfred Forchel2, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG), Univ. Stuttgart, Allmandring 3, 70569 Stuttgart — 2Technische Physik, Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg
The talk addresses recent results on the fascinating effect of "non-resonant emitter-cavity coupling" which is observed as an unexpected pronounced cavity resonance emission even in strongly detuned single quantum dot (QD)-microcavity systems. This phenomenon is an indication of strong, complex light-matter interactions in solid-state systems, going beyond the predictions by the general Jaynes-Cummings interaction picture of a discrete two-level emitter and cavity system. We have studied the effect of non-resonant QD-cavity coupling from individual QDs in micropillars under resonant excitation, revealing a pronounced effect over positive and negative QD-mode detunings. Our results suggest a dominant role of phonon-mediated dephasing in dot-cavity coupling, giving a new perspective to the controversial discussions ongoing in the literature. Furthermore, non-resonant coupling is demonstrated as a versatile "monitoring" tool to investigate relevant QD s-shell emission properties and background-free photon statistics from individual QDs under purely resonant excitation.